Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4aac5f7dde04dfd8fba22bbc0749f81181b9fb037a1307d0d4ebd88ead5e0c9d' 
  AND token = 'E831N3e59Xm5yx8q3IxSw94MPEyou5x3d7s/jZqEpF4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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