Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b211845cebbb68307f9fcef8fcf1071027b2b6b86b738dae077d057c7fdb1a06' 
  AND token = 'QIgbGE8XffdsLV6YID4P0JVQAoudF3fIN12it5CNLZI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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