SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1f754f94a412da56cebfcf32c93f1bf34e736f5775b84a1a9866084aa858608' 
  AND token = 'bw/J1PcSNJZuoy6XBzNPsQPiQuRnVhQ6hWIpl/BKrxM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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