Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c611ef3b9494d98de97789fcdf2fcecfbb41daafb2b7cfb5257a8c990201ab3f' 
  AND token = 'SVtlrvPQwDTSzX7nogf10xUOY/9e413fK0CnUhAW+nw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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