Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'debb5e5ca13d4103d9ec02cc8670e8bbae1d0134d66cf5b10002da969e267422' 
  AND token = 'cuC/f4X5vhh0CKXQ1R4tSFY5cg59ksM1dKyeyr0EPx0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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