Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f16ef727b5463fb7e5ef3909ebc63fa8b956b0e6a0b469d77acfda665411304' 
  AND token = 'dIpjeLfqSEkGYTglDPDFk9HmfYKDPQkdImawiNrFeCI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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