Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebaa0eba9092ebde0dac917a16a0866c81b5afb63b4c2b0936b346d13a3d3564' 
  AND token = 'JDL+vXIcaoi4WZNRsqWirzY2rB+fKn1H77VulqeNvws=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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