Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2031a68d18ef73ad0fb17143b0b8ae17c432a0bd8057d7b0e85e33dfe0c09fc4' 
  AND token = 'QUNfZaXALvWe6eTY08G5Nl1CUhe66j5cIHlIgPVcxnw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}