SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14421607c2c0819f78fe3420f4b26ca3e84c413b6e43459f433dfc5891af81a9' 
  AND token = 'GXYvgjsC2JnTjyqI/Uc7/48lT4qJPVcYIu+HBDynM4Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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