Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f85d4af91dc4d0dad06c48e22d6116a5653604e51a3ee86890057ce3e9d82c2f' 
  AND token = 'Mo39IdrgH3kmj3Piy3oDzaBxc3d/hk2wRoswgRARMrQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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