Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd08df68fae721a96ca57090fb4d2069a9be90614c6b4875cd44074117795c41' 
  AND token = 'PoeNExy+/lIa60w9S/66MCGd9RsmdLDFd4DhzDEPNp8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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