Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee192913fb07cf37fdd3148f29505c59f14fbdf694299d6689e64bf58c3c7420' 
  AND token = 'l2qg8fDiu0lnE4/buUZq7BmpZ1MWkoX6qWAxxk6v9LU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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