Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c6d92bb1bbd158a555fbd26a70e6e5534e5363f030ce78368a553827b697f44' 
  AND token = 'Fd3ZsFJrKFk7n1bDB1QElVeW4/WKZKgY1XO6CGR/oso=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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