Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '75db9d50377f7afea89a474eb4d8679d07c60c700690c1db7379afe58ca4e96c' 
  AND token = 'lxiEDbS49P6HjPKY74TxwasMNCvv64KCEXKZ/qpJ/W4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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