Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0df54a7754fa8facb536ce2cfc1ca7976912170bff4a6fd480311bb6a91e55c2' 
  AND token = 'uVJE7WTWti5kJmh5rpS2oCq5AEcDZKC255niborT+io=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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