Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2da98324546f5bd7a8a02e6e5db6847ff4eccc4fea6d51ce0be2ba298798cf8' 
  AND token = '6qi8dCBUoyV0+ccAK955YMCXnxgeOOiUEiBmtNJgd08=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00136

JSON explain

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