SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2c170a9b9ea7b3cdb82f470e73e0c73d0552df4279aac3ff768660ccb749e644' 
  AND token = 'sKezWDc0F+9FdvBO2lygYnzU+zI4+KSRqGwwHGg5CHQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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