Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '76e08eae085c602166aa3c6a608526ceb954b2c079924b5b0dd27b4e16e3166d' 
  AND token = 'uIRR3VHM2T4ON3CKmiSw39K6RBEBxYnt/h+muvnsPZs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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