Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee18d48edaaa344aa2878fc20e89ff8c78e248588a2378711c1a01407b432af3' 
  AND token = '5wDH/JTILXlO3FcEnSbfalM7QF4NgAZ233ytgYqc/UI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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