Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5917c894d3aa3e7de3a04dbbc34f425eb5ce39ff67f7ca1e3e0b9a2961116fc2' 
  AND token = 'iHI4YHHJNKfPlgOaRl6XGYcaYklQI7d/Z5dxcrJn2g0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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