Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'cf11735a4f054bb377c18831a348bd2d5a263e642b18fd458a2aed9fd25de17e' 
  AND token = 'CW741BAM6X9g23LR4ETwCEunV14RSO3uQ9I6+NK9d4g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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