Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '335f9b1f4f4d232650c408edfa75a49818294ad42d29396cfd017bba2aaa87cf' 
  AND token = 'xE65J3W9x09HvPOoYN9DYEJxaasiqBTW6qlm4JHlrjY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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