Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cf41f2309d678e03d69a0efe0bacb189c4243e726bf3c0b1b744d9f58843c2e9' 
  AND token = '3tXrDKtHzModvzHVv1lzpIS+sM9CcXs9J+x+6n3/4ow=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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