SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a633deadc2e6e9b2a7f3e0d4fc68fb2d32809a070a379d479ca991ec8a28dd55' 
  AND token = 'iJG4+FnZQFIhOJJWkyayijBPQqZCLNfr/KzkYI3WKew=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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