Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b204907291e437c3973d556eb317a820e4ea1a87ec3204623deba00e9959a0d8' 
  AND token = '96PpcSPMb3PldwE6UFGphtyH8GAH7KkdkRZYE72x7tI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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