Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa1a1938add0d44987f6d290076c7bd811a1e68d05edbdc9902e6fea5210c80e' 
  AND token = 'iW2AH3oLEdVgkRx0pir3gHZ7AQGsEzIYY28bf5WC2JY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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