Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b299e38a3d201ae59de319ebf30110ab1ab9aac1df9dd6221de27d91ef4ab9a' 
  AND token = 'spDhMdMvdHl5qLcfIdQfDOhLPc5VWPHB39Qd+y9keqk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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