Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e2a1016b221e5da6c3dfa4a07a9a6b4a6bbd754e44222f6000e6d051a7b50eb9' 
  AND token = '5Mlpcna1QGRvIauCuBuHdTI4dpf1mdOxolDZvAykBhs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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