Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62359a9f5beb52a647950284319f628640dce2455ffafb21688900094d824de5' 
  AND token = 'Ht4cEoBVD/jlkI5iyAfRJl165hBUXfOKSSMyVYisHLQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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