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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1465023d3b3d91ea54f0cdee3e6a5f52400b254ed44252e05d2f5c465dcb65f' 
  AND token = 'JPz5zOda6cUhhQHp5kEnT5GeGWT1rao+jWwLNgnIIks=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00900

JSON explain

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