Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee7408b5ab5d93ae8a3ec0326bc0901fe74be783086ce2ea19ee69f22fc9f8e0' 
  AND token = 'xxvjIPqYwcSqTF8TiLEIR+Yaq10yOTTfaC6gFUQhb9I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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