Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1292d813e731b46dc3cd2867ceefa03d0f064879d679999f0a940a0b83b3c4d3' 
  AND token = 'ftNSNjtQ9ZcbJdmCSNORQ9EJZfkXNVTS87ACroEKnfw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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