Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40ac93b4abdc33926a846cc44315f362a6fb24e286a345986a7719774f38d3a3' 
  AND token = 'lHNqgSsFoeGS3zPtLawpB676EdwrvIwpdiKPE7qATKU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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