Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7fc9b3c84f23eacbeb14f4740a7d531abe9a07e02a9f1b4923494e26d64c9f2d' 
  AND token = 'Xh8ZjzAh1O3aEw9rfzlOvpq3nJADlm4ZO+h2Z27X4Wk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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