Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13700ffaee67b9ae45f61d33a40c96fda7124df1b9c1cacb83c3f50974ddd503' 
  AND token = 'eDhF60fLyyGFZXc8M6vgoZlYu++x0T0pJAWPBZtcC30=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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