SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7441d56771c612d533260c50c927b2c9c6669682e23a806f1e4dd5dedb9ab8e' 
  AND token = 'JLZR5ghf8aijrAewmuZqxPzGjrVhUH+NiiHEH5XMO1Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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