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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1c54ef81f09c8d05d031afe803bf21d7e312846c4de5c0f114262d9f501d9941' 
  AND token = 'Lvh60qQAbtYutIMIneK2dNJPfX9OEnGlebUgkDvYyA8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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