Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b0805871556432e7b77ede73901aff5c04adf58fd46588843ec7167d0cd321f8' 
  AND token = 'uX5gsv2gc8Myj2scf+q7hXv/tiHM257YobFP201mHtw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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