SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '86d7d9592d5098a9303ac5c752138340c5f5d58bb428dfea2e0ae97224799844' 
  AND token = 'YU3CAzY8u0y/zLMnhQIa7m8xQlNJ6Swv3g1FoYdG71Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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