Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b4e0410d48a003d362eb9cd6413ed80f27988985a80c017d768071c6de2083c' 
  AND token = 'yVED8xfEXU/JlYr+HyBycfJZzk6urUQqhirEDu3IM+Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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