Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d3858a684c8d149974539ea81510004518e3b27d6266ff45612f5fe4217907c' 
  AND token = '2iP4k49pi7F/yv+zTgkVAZJ7yJaZk/eWPcgOFyc3JzQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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