Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b8ac894d25b9c8b7488121e1960cdf18d9440008ad490d41c31df46167042b35' 
  AND token = 'fYUBTDdN2dJtfhxgDCETLXFti29Uw8V9N0dtLi/ZRhM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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