Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3eeaf437e2598ef251fba326b5b9782bbe48bc867fdcf9958b5e494dd41fc9d4' 
  AND token = 'oVxFIcbsWSUsQkRHad4chMcVLYQk/er8qXkNaJZ7twQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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