Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7df42d3449ee9fea6045f7638008473350ad25e25d6e72f1329f6fa3e685d803' 
  AND token = '7EcbfrzFisqiRqWOSkzkuEqvbbn8l1ntGCtmfqgZaP8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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