Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9de6758033967edf3c9857c6cc007f13278eaf082bc81867b695203457da88ea' 
  AND token = 'vtbYuXmrUtM4AC4/LSGdo8oI9e+4Mr/D2s1RrEhH92I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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