Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20a167248d25a2a9939325e18dae4eb07e15201446776e4093a774cc423b6ad0' 
  AND token = 'hZ/EGsgb0WGhXNrHJIqPHESUIAcONuDARWzLLMkpER0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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