SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '675cbd9d6f35b29c7cdc2a159575240b2c48929d83e9c333feb5009969545943' 
  AND token = 'rhANeGJBlVFO3CDZNLW8wqjQeaq2PXOGJkGxTT6DJAQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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