Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b3a1c877421f58b34ef4237f2c6597486800c86d2bb200275f10bf7d63c22d14' 
  AND token = 'Ha+JtkkkfuaAASOykeJHdgICH7dHTGej5gdhP6a8DgQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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