Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b38422945a68ae7207f68d43f64eb3cb20464190241febe49f27987e7fcf070' 
  AND token = 'h9sG87ycU0fAPJbiLVt4PbM/6/YN65kcu+jbq/ie+gw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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