Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d840a5e702132eb713906af2166b7c620b6e2948c5b8cfdd1b1ba17d5835706' 
  AND token = 'gzIlTYkkhPy+j+i6UOMcef5shruJsON8HIG3Pot7970=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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