Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '94a943342dc921ea62b71271cac08aecc7a2d4063714a2071a47b672543ec78b' 
  AND token = 'GowOj76how2yaS7UJnxl+XZa6RDZR44PwSUuVo9jcs8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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