Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5149f59d8b35cd3218bb20d78b650ba9d87638dfbd2f6c98460999e965097ad8' 
  AND token = 'BNrPgISPxw62b5p6dhgqzgn7VJaM5x27DDmFrJWqEik=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}