Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bacd538115b6842ee6aac81376aef0f3585bae0a5c68cf081d3332c1a4067ffe' 
  AND token = '4YYLmjAekff7YLGpB0/8dDFWo/0pzO+y/H8T7//zkWk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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