Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1bef85bc78ecd35a0ca3b377a0c3656abc2bdebae20e077358eae1787af8649a' 
  AND token = '8LwyjZuSs1+9qt0gUQ4jnZAM0XTVls2ciwgTEAtG9ZM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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