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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e08eda01f42288db335e343f39b8afdb2485807d981fc6ca6e4292328d4364be' 
  AND token = 'cGeS511n8L94uhKW0oruTpHZ8R430z2m1GdAqvOzSG8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}