Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f549e9bc7dc517f0b61d74699901ef4d6b1de77b33ee53ab886b044ca0331b8c' 
  AND token = 'M7brJD9Dygnri4M4lATruRN82GQ7Mn1sNE3uofoHLW0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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