Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8714a812e277f5c01218deed8ee1644686c9ef1f30b403a0263e250df9b162c0' 
  AND token = 'TqtDDAHw8IIneKspEEfMVwpEiUr3SU7fIXBXXZ92GNY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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