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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '84dd62d40cafa78f0d81ba7e7549aadb22b3141f6f1d2e8720d35b44f22081eb' 
  AND token = '89W0AJsXRnFQ/a8KF7qI8pIzf0wS87VSFgKdaAzmLXQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}