Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3fecbea63d316f55a64469773fcc6221fc3a2beb769b2559cceb98f5848d0b1c' 
  AND token = 'DWgDqQw50ayCgY4qTcCylfCZ1RiCkJ8S2Rf29AJOTts=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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