Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e2e8c6ad0e3e299d04c83e217473e1c653a9728089e797125d6818e2bf2c2ee' 
  AND token = 'OOuZ1MPcem0PkAYGmCYH3K2A1g+R9sa6sRVmdoA6nZQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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