Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17916bee75be2a65d66f7e27c28bab6cb1b4c9efa2a6ecc864d4d93e56ab80cf' 
  AND token = '9k5xHIzJh/NtFxBwMTGOecMfahw2pg7N14dis6Axasw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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