Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '740e530739d49b0b8502f4a308d632d9a0e5f1e7da4a31ffbf0b73e9ae83b1cf' 
  AND token = 'JGTOYhfcBgXzPSSHboVqyd9cpfENpieXRQFhrfTOuxU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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