Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10b205adc549c695ea64add3dcfeb65f2df35c91c49100356b769d325f84ea0e' 
  AND token = 'TSL3AA8a2l48rOaA3mGYDbOv0qa1yTvCvUYAY+FUQws=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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