Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92994d1a457b24111bb80f1331f0622eca07b8adc5eb680a7d9bb9bc0ba25582' 
  AND token = 'C0l8wFfXzadhvF0CR5VzrYcHL8pY0x05KrEDiD5Ks1E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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