Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9138046df0c52b8253e3780269d6d720b33d82c3a07d851497107e54e10507b4' 
  AND token = '3YCR15/gPGTCMCX23c+XV+RSaDiN3WsvupVi5OB8gvA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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