Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e0a2322a6938d8f2e71208def36979dcb25de49a863e50c18ec472f688e1740' 
  AND token = 'LJbE4XV7fMsaCExPjDdSHtmemdEk3TX9r6LKTpibW/c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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