Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5183bbc370ad1016b852d8ec82cbd9a59573eb87940e6ba274bddd244c34f37b' 
  AND token = '9D8vaDZGyLs72s3CfkXlyEEe5VGqn/y07icQI1uStgg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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