SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'eed07fd07abf3c73c64fc8b386750925bfb6fb8345df0b33ae25a029591be915' 
  AND token = 'nbz//FigW9OQ8nAeYJvhs6dUMriXZ9ibjKzGEdX4Bmw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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