Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c6f56c7f86a7f12efbe11a28937848fecd1d07777f110b6c289a4e297862a8f3' 
  AND token = 'jP/J8/abSWHdtpkr5jNYAUp90Bm4yXbF2nHIW6bnoIg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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