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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '485341a3fed4016677c76fc59e98e0277817d98240f9701d6418fb81e135642c' 
  AND token = 'XHaJ7+UR/wKOP7tVOclSlDHkjU6Tjiw+c13uyzdKvfE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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